All-in-One Monotub Starter Kit | 4 lb Bag + 28Q Tub – Midwest Grow Kits
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All-in-One Mushroom Monotub Starter Grow Kit (6 LBS)

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$3999
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Colonize in our 4 lb All-in-One grow bag, then fruit in the included Grower's Select 28Q monotub. Includes 2 lbs extra CVG substrate, filter disks, plugs, liner, spray bottle and a quick-start guide.

🔥 332 purchased in the last 30 days
⭐ 2000+ units sold

Description

The All-in-One Monotub Starter Kit pairs our 4 lb All-in-One grow bag with a Grower's Select 28Q monotub and 2 lbs of extra CVG substrate. Colonize in the bag, then move the cake into the tub for a much bigger fruiting surface — the easiest bridge from bag growing to monotubs.

Grower's Select 28Q monotub fruiting mushrooms beside a 4 lb All-in-One grow bag and spray bottle on a light wood counter
Start in a bag. Finish in a tub.

Colonize the sterile 4 lb bag, then spread it with 2 lbs of extra CVG across a 28Q monotub. Everything but the spores is in the box.

Everything is in the box except your spores or liquid culture: the sterilized bag, the tub with filter disks, plugs and liner, the extra substrate, a fine-mist spray bottle and a quick-start guide. It all fits in a 12" × 12" footprint.

  • Bag + monotub in one kit
  • 28Q Grower's Select tub
  • Extra CVG substrate
  • Spray bottle included
  • 6 lbsTotal grain + substrate
  • 4 lbAll-in-One bag
  • 28QMonotub, 12" cube
  • 2 lbsExtra CVG
  • 4Filter disks + plugs

Why growers pick the starter kit

Two 28Q Grower's Select monotubs with lids off, each fruiting golden-capped mushrooms across the full surface
Bag ease, tub-sized flushes

Colonize in a sealed, sterile bag, then fruit across the full width of a 28Q monotub instead of just the top of a bag.

All-in-One Monotub Starter Kit contents on a wood table: grow bag and box, 28Q tub, CVG bag, liner, spray bottle, filter disks and plugs
Everything in one box

Bag, tub, 2 lbs of extra CVG, filter disks, plugs, liner and a spray bottle. All you add is spores or liquid culture.

Clean Grower's Select 28Q monotub with its clear lid on, drying on a towel by a kitchen sink beside filter disks and a plug
A tub you'll run again

The Grower's Select 28Q has extra-thick walls that don't flex when you move it. Wash it after harvest and go again with a refill.

How to grow with the starter kit

Four steps from sealed bag to harvest. All you add is spores or liquid culture.

Gloved hand injecting a syringe into the self-healing injection port of an All-in-One grow bag 1Inoculate the bag

Wipe the port with alcohol and inject 4–5cc of spores or 5–10cc of liquid culture through the self-healing port.

Hands breaking and mixing colonized grain through the substrate of a sealed All-in-One grow bag 2Incubate, break and shake

Keep the bag at 72–76°F. At roughly 50–75% colonization, break up the grain and mix it through the substrate, then let it finish.

Gloved hands crumbling a colonized grow bag into a lined Grower's Select 28Q monotub over coco coir substrate 3Move it to the tub

Line the tub, break the colonized bag into it and mix in the 2 lbs of Select Bulk Substrate. Level it, plug the holes and let it recolonize.

28Q Grower's Select monotub with its clear lid on, fruiting golden-capped mushrooms 4Fruit and harvest

When the surface is fully white, pull the plugs, give it indirect light and mist. Pick each flush and rehydrate for more.

Bag stage walkthrough: the All-in-One Grow Bag Guide covers inoculation, colonization and break-and-shake timing with real grow photos. Not sure how many syringes to buy? Use our syringe calculator.

Why the tub makes the difference

Gloved hand picking a golden-capped mushroom from an open Grower's Select 28Q monotub, with harvested mushrooms on a plate Harvesting a flush from the tub
More surface, more mushrooms

A bag fruits only from its top. Spreading the colonized bag and 2 lbs of extra CVG across the 28Q tub gives the mycelium a wide, flat surface with filtered air exchange through the lid's filter disks, which is where bulk growers see their biggest flushes.

  • Fits a 12" × 12" footprint
  • Custom liner helps stop side pinning
  • Filter disks and plugs included
What you add

Spores or liquid culture, nothing else: 4–5cc of spores or 5–10cc of liquid culture.

Liquid culture usually colonizes faster than spores.

What's in the kit

  • 4 lb All-in-One grow bag — 1.75 lbs milo, millet & rye grain + 2.25 lbs CVG substrate, 0.22 micron filter patch, self-healing injection port
  • Grower's Select 28-quart monotub (12" × 12" × 12")
  • 2 lbs Select Bulk Substrate (CVG: coco coir, vermiculite & gypsum)
  • 4 × monotub filter disks and 4 × plugs
  • Custom fitted liner, food-safe HDPE and BPA free — helps prevent side pinning and makes cleanup easy
  • Fine-mist spray bottle
  • Quick-start guide with step-by-step instructions

Specifications

Specification Detail
Grow bag 4 lb All-in-One: 1.75 lbs milo, millet & rye + 2.25 lbs CVG
Bag filter / port 0.22 micron filter patch; self-healing injection port
Monotub Grower's Select 28Q, 12" × 12" × 12"
Extra substrate 2 lbs Select Bulk Substrate (CVG)
Tub accessories 4 filter disks, 4 plugs, custom fitted liner (food-safe HDPE, BPA free)
Also included Spray bottle, quick-start guide
Inoculation 4–5cc spores or 5–10cc liquid culture
Incubation 72–76°F
You provide Spores or liquid culture

Pick your All-in-One setup

Starter Kit 4 lb Bag XL 6 lb Bag Upgrade Kit
Use it for Bag and tub in one box Your first bulk grow Bigger flushes, same steps Moving a 4 lb bag to a tub
Contents 4 lb bag, 28Q tub, 2 lbs CVG 1.75 lbs grain + 2.25 lbs CVG 2 lbs 5-grain + 4 lbs substrate 28Q tub, 2 lbs substrate, filters, liner
Fruit it In a 28Q monotub In the bag In the bag In a 28Q monotub
You supply Spores or liquid culture Spores or liquid culture Spores or liquid culture A colonized 4 lb bag

Faster startsLiquid culture usually colonizes faster than spores. Our QuickCulture Mini liquid culture jars turn a spore syringe into vigorous liquid culture before you inoculate your bag. Shopping for genetics? Browse our liquid culture syringes or spores from Spore Genetics.

Just want the bag?The 4 lb and XL 6 lb All-in-One bags are sold on their own in All-in-One grow bags, and the Grower's Select 28Q is sold separately in monotubs.


Common questions

Why move the bag into a monotub?

A monotub gives the colonized substrate a much wider, flatter fruiting surface than the top of a bag, with filtered air exchange through the tub's filter disks. That is where most bulk growers see their biggest flushes.

What do I do with the extra 2 lbs of substrate?

When the bag is fully colonized, break its contents into the lined 28Q tub and mix the 2 lbs of Select Bulk Substrate through it. Level the surface and let it recolonize before fruiting.

What else do I need?

Only spores or liquid culture. Use 4–5cc of spores or 5–10cc of liquid culture.

When should I break and shake the bag?

When the grain is roughly 50–75% colonized. Breaking up the colonized grain and mixing it through the substrate spreads the mycelium and shortens the time to full colonization. Let the bag finish colonizing before you move it to the tub.

Do I open the bag while it colonizes?

No. Keep the bag sealed until it is fully colonized. The 0.22 micron filter patch lets the bag breathe while keeping contaminants out. Open it only when you move it into the tub.

What is the liner for?

The custom fitted liner is food-safe HDPE and BPA free. It helps prevent mushrooms from pinning down the sides of the tub, and it lifts out with the spent substrate so cleanup is quick.

Can I get more than one flush?

Yes. After you harvest, rehydrate the substrate surface, then keep the same fruiting conditions for the next flush. Later flushes are usually smaller than the first.

Can I reuse the monotub?

Yes. After your last flush, pull the liner, wash and disinfect the tub, and run it again with fresh spawn and substrate.

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